For example erythritol itself occurs naturally in some fruit and fermented foods, making it a "normal sweetener".
If you regularly consume ordinary sugar, you may be in the “not that healthy to begin with” category yourself.
Stevia is a wholly suitable alternative, although its taste and dosing takes some getting used to. Good quality honey in moderation is also fine if the HbA1c stays optimal.
> "you aren't all that healthy to begin with if you decide to swap normal sweeteners for chemicals?"
I'm pointing out that there are health issues for everybody with "normal sweeteners", so choosing to substitute them doesn't imply that "you aren't all that healthy to begin with".
https://www.samsclub.com/p/quest-protein-bar-variety-chocola...
Of course, a significant majority of Americans aren't all that healthy - I guess I'm not sure what your point is.